Radial Shock-Absorber

The shock-absorber is a part of the DST tool string used for oil and gas well testing opeation. There are two types of shock -absorber: Radial shock- absorber and Vertical shock-absorber.

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Description

introduction
The shock- absorber is a part of the DST tool string used for oil and gas well testing opeation. There are two types of shock- absorber: Radial shock -absorber and Vertical shock -absorber.

The radial shock- absorber protect pressure-measuring equipment or sensitive components in the workstring for shock loads transmitted through the workstring by firing of TCP guns. It can also help straighten the workstring. This radial shock -absorber is mainly composed by radial shock -absorption component and axial slide component. The radial shock -absorption component include block retainer , housing retainer,block , block spring retention and spring. The axial slide component include housing retainer, lower adapter, mandrel , shear pin , lower bearing thrust and ring shear

The vertical shock from axial slide can be transferred to the vertical shock- absorber, a part of shock will be absorbed by axial slide movement and the shear pin effect, so that the condition of radial shock -absorber component and inner-wall tubing are relative stable.

Technical Parameter

No	Specification	7”
1	O.D.	161mm
2	Bore Diameter	57mm
3	Length	1170mm
4	Working Pressure	70Mpa
5	Internal pressure strength	111Mpa
6	External pressure strength	100Mpa
7	Tensile strength	1237KN
8	Torque strength	18KN.m
9	Service	H2S,NACE MR0175(>175^oF)
10	Working temperature	-29^oC+204^oC
11	Connection thread	3 1/2 IF.BXP

table2

Size /in	OD /mm	ID /mm	Working pressure /Mpa	Service environment	Working temerature	Connection
3 7/8	98.5	45	105	Mud, oil and Natural gas with H2S and acid	Max 450^oF	EUE IF